$("#addItem").submit(function (envent)
{
    envent.preventDefault();
    var form = $(this);
    $.ajax({
        url:"",
        type:"post",
        data: form.serialize(),
        dataType: "json",
        success: function (data)
        {
            if (data=true){
                alert("提交成功："+data)
            }
        }
    });
});
